Explanations ok Plates. 237 



TIIYSANODICTYA, gen. nov. 



Ta-e 125. 

 (See Plates XXIII, XXIV, XXV, XXVI, XXVII, XXXVIII, XXXIX, XL, XLII, LIU.) 



TlIYSANODICTYA KUDIS, ILlU (sp.). 



Page 128. 



(See Plate XXIII ) 



Figui-e 7. A fragment of a cup showing the coarse, square primary spicular 

 bands and the very fine subordinate reticulation. 

 Chemung group. Wellsville, New York. 



